[Elecraft] K3s problem

[Dave Sublette]

I have had my K3s since January.  I use it exclusively on CW.  Twice in the
past ten days, in the middle of a QSO,  I can hear nothing when I stop
sending.  No background noise. No signal.  The quick fix is to turn the
unit off, then right back on.

There is at least an inch of cooling all around the radio.  I haven't ever
used it on digital. In other words, I don't think it is a heat problem.

Any thoughts?

thanks,

Dave, K4TO